[postgis-devel] [PostGIS] #1641: SQL/MM Spatial exception - geometry crosses an edge

[PostGIS]

#1641: SQL/MM Spatial exception - geometry crosses an edge
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 Reporter:  lrssvt    |       Owner:  strk         
     Type:  defect    |      Status:  new          
 Priority:  medium    |   Milestone:  PostGIS 2.0.0
Component:  topology  |     Version:  2.0.x        
 Keywords:            |  
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Comment(by strk):

 Replying to [comment:1 lrssvt]:

 > How do I determine the correct tolerance?

 So to answer this again (I didn't really answer before).
 I suggest you use the value that you do tollerate in your topology.
 Millimeter precision is enough and your units are meters ? Use 1e-3 !

 There is support for specifying a topology-wide tolerance (it's an
 argument to CreateTopology)
 but no funtion currently really uses it at the moment. You can surely use
 it as a reference.

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Ticket URL: <http://trac.osgeo.org/postgis/ticket/1641#comment:6>
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